I followed Ludwig's method of cutting away the two sides of the outer stem with a sharp knife.
Then I stuck it in a nice big ball of LFS and then buried that within my typical airy mix so as the roots grow and the LFS decays I won't have to move it.
I thought about doing that, but I've read that certain Nepenthes don't do as well in water, and I was more worried about rotting my cutting. I'll probably try the water method next time.
xvart.